fix(editor): enable backslash escapes for MySQL-family dialects

apps/desktop/src/lib/__tests__/editor/codemirrorSqlDialect.spec.ts

@@ -75,4 +75,37 @@ describe("codemirrorSqlDialect", () => {
       expect(createDbxCodeMirrorSqlDialect(langSql, "mysql", databaseType).spec.doubleQuotedStrings, databaseType).toBe(false);
     }
   });
+
+  it("enables backslashEscapes for MySQL-family dialects and ClickHouse while keeping it disabled for standard dialects", () => {
+    const backslashEscapesTypes: DatabaseType[] = ["mysql", "doris", "starrocks", "manticoresearch", "goldendb", "gbase", "clickhouse", "hive", "spark", "impala", "argo", "databend"];
+    for (const databaseType of backslashEscapesTypes) {
+      expect(createDbxCodeMirrorSqlDialect(langSql, "mysql", databaseType).spec.backslashEscapes, databaseType).toBe(true);
+    }
+
+    const standardTypes: DatabaseType[] = ["postgres", "sqlserver", "sqlite", "oracle", "dameng"];
+    for (const databaseType of standardTypes) {
+      expect(createDbxCodeMirrorSqlDialect(langSql, "mysql", databaseType).spec.backslashEscapes, databaseType).toBeUndefined();
+    }
+  });
+
+  it("correctly tokenizes string literals containing escaped quotes in MySQL statements without corrupting trailing code", () => {
+    const dialect = createDbxCodeMirrorSqlDialect(langSql, "mysql", "mysql");
+    const statement = ["SELECT CONCAT('\\'', sl.id) id, sl.settlement_price_tax '本次结算金额含税',", "CASE sc.`type`", "    WHEN 0 THEN '物资'", "    WHEN 1 THEN '设备'", "    ELSE ''", "END AS '合同类型'"].join("\n");
+
+    expect(nodeNameAt(dialect, statement, "'\\''")).toBe("String");
+    expect(nodeNameAt(dialect, statement, "'本次结算金额含税'")).toBe("String");
+    expect(nodeNameAt(dialect, statement, "CASE")).toBe("Keyword");
+    expect(nodeNameAt(dialect, statement, "`type`")).toBe("QuotedIdentifier");
+    expect(nodeNameAt(dialect, statement, "WHEN")).toBe("Keyword");
+    expect(nodeNameAt(dialect, statement, "THEN")).toBe("Keyword");
+    expect(nodeNameAt(dialect, statement, "'物资'")).toBe("String");
+    expect(nodeNameAt(dialect, statement, "'设备'")).toBe("String");
+    expect(nodeNameAt(dialect, statement, "''")).toBe("String");
+    expect(nodeNameAt(dialect, statement, "END")).toBe("Keyword");
+    expect(nodeNameAt(dialect, statement, "'合同类型'")).toBe("String");
+
+    const doubleQuoteStatement = 'SELECT "escaped\\"quote", col FROM tbl';
+    expect(nodeNameAt(dialect, doubleQuoteStatement, '"escaped\\"quote"')).toBe("String");
+    expect(nodeNameAt(dialect, doubleQuoteStatement, "col")).toBe("Identifier");
+  });
 });

apps/desktop/src/lib/editor/codemirrorSqlDialect.ts

@@ -10,6 +10,11 @@ const MYSQL_CODEMIRROR_DATABASE_TYPES = new Set<DatabaseType>(["mysql", "doris",
 const POSTGRES_CODEMIRROR_DATABASE_TYPES = new Set<DatabaseType>(["postgres", "redshift", "gaussdb", "kwdb", "kingbase", "highgo", "uxdb", "vastbase", "opengauss", "questdb"]);
 const ORACLE_CODEMIRROR_DATABASE_TYPES = new Set<DatabaseType>(["oracle", "dameng", "yashandb", "oscar", "oceanbase-oracle"]);
 const SQLITE_CODEMIRROR_DATABASE_TYPES = new Set<DatabaseType>(["sqlite", "rqlite", "turso", "cloudflare-d1"]);
+// Non-MySQL-wire dialects whose servers still interpret backslash escapes in string
+// literals; the mysql-family types are covered by isMysql at the define() site. Mirrors
+// BACKSLASH_ESCAPE_STRING_DIALECTS in lib/sql/sqlStatementRanges.ts so the editor
+// tokenizer and the statement splitter agree on escape semantics per dialect.
+const BACKSLASH_ESCAPE_CODEMIRROR_DATABASE_TYPES = new Set<DatabaseType>(["hive", "argo", "impala", "spark", "databend"]);
 
 const CODEMIRROR_SQLITE_EXTENSION_KEYWORDS = new Set("abort analyze attach autoincrement conflict database detach exclusive fail glob ignore index indexed instead isnull notnull offset plan pragma query raise regexp reindex rename replace temp vacuum virtual".split(" "));
 const STANDARD_SQL_TYPES = "array binary bit boolean char character clob date decimal double float int integer interval large national nchar nclob numeric object precision real smallint time timestamp varchar varying";
@@ -245,6 +250,11 @@ export function createDbxCodeMirrorSqlDialect(langSql: CodeMirrorSqlLanguageModu
           spaceAfterDashes: false,
         }
       : {}),
+    ...(isMysql || (databaseType && BACKSLASH_ESCAPE_CODEMIRROR_DATABASE_TYPES.has(databaseType))
+      ? {
+          backslashEscapes: true,
+        }
+      : {}),
     ...(isPlsql ? { doubleQuotedStrings: false } : {}),
     doubleDollarQuotedStrings: false,
   });